17975980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{809}}^1$

素因数の和:930

約数の個数: 48

約数和(自身を含む): 41640480

約数和(自身を除く): 23664500

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 101, 110, 202, 220, 404, 505, 809, 1010, 1111, 1618, 2020, 2222, 3236, 4045, 4444, 5555, 8090, 8899, 11110, 16180, 17798, 22220, 35596, 44495, 81709, 88990, 163418, 177980, 326836, 408545, 817090, 898799, 1634180, 1797598, 3595196, 4493995, 8987990, 17975980]

約数ペア:

[(1, 17975980), (2, 8987990), (4, 4493995), (5, 3595196), (10, 1797598), (11, 1634180), (20, 898799), (22, 817090), (44, 408545), (55, 326836), (101, 177980), (110, 163418), (202, 88990), (220, 81709), (404, 44495), (505, 35596), (809, 22220), (1010, 17798), (1111, 16180), (1618, 11110), (2020, 8899), (2222, 8090), (3236, 5555), (4045, 4444)]